Witt is a surname. People with this surname include:

• Alex Witt (born 1961), American news anchor
• Alexander Witt (born 1952), Chilean-American filmmaker
• Alicia Witt (born 1975), American actress
• Bob Witt, vaudeville performer and the "Witt" in the group Witt and Berg
• Bobby Witt Jr. (born 2000), American baseball player
• Bobby Witt Sr. (born 1964), American baseball player, father of Bobby Jr.
• Brendan Witt (born 1975), American football player
• Carl Gustav Witt (1866–1946), German astronomer
• Christian Friedrich Witt (1660s–1717), German baroque composer
• Ernst Witt (1911–1991), German mathematician
• Franz Xaver Witt (1834 – 1888), German composer of Cecilian music
• Friedrich Witt (1770–1836), German composer (not to be confused with Christian Friedrich above)
• Fritz Witt (1908–1944), German Waffen-SS general
• George Witt (baseball) (1933–2013), American baseball player
• George Witt (collector) (1804–1869), doctor, banker and mayor known for his collection of erotic objects
• George Witt (politician) (1863–1925), American politician in the state of Washington
• Holly Witt, American model and actress
• Howard Witt (?–2017), American actor
• Jake Witt (born 2000), American football player
• James Lee Witt (born 1944), American director of FEMA
• Joachim Witt (born 1949), German musician
• Josef Witt (1901–1994), Austrian operatic tenor
• Katarina Witt (born 1965), German figure skater
• Liza Witt, Australian singer and actress
• Louie Steven Witt, witness to the Kennedy assassination, known as Umbrella man
• Marcos Witt (born 1962), American Christian composer
• Michael Witt (born 1984), Australian rugby league player
• Mike Witt (born 1960), American baseball player
• Nathan Witt (1903–1982), American labor lawyer
• Otto Witt (1875–1923), Swedish author
• Paul Junger Witt (1941–2018), American film and television producer
• Robert Witt (disambiguation), several people
• Roz Witt, American television and film actress
• Sam Witt (born 1970), American poet
• Ulrich Witt (born 1946), German economist
• Uwe Witt (born 1959), German politician
• Vicki Witt, American model
• Wastl Witt (1882–1955), German actor
• Will Witt (born 1996), American conservative political commentator
• Whitey Witt (1895–1988), American baseball player